A. their total sum is zero
B. two resolved parts in two directions at right angles are equal
C. sum of resolved parts in any two per-pendicular directions are both zero
D. all of them are inclined equally
E. none of the above
Related Mcqs:
- If three forces acting in different planes can be represented by a triangle, these will be in________________?
A. non-equilibrium
B. partial equilibrium
C. full equilibrium
D. unpredictable
E. none of the above - Forces are called coplanar when all of them acting on body lie in __________________?
A. one point
B. one plane
C. different planes
D. perpendicular planes
E. different points - Two non-collinear parallel equal forces acting in opposite direction__________________?
A. balance each other
B. constitute a moment
C. constitute a couple
D. constitute a moment of couple
E. constitute a resultant couple - The necessary condition for forces to be in equilibrium is that these should be_________________?
A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else - If a rigid body is in equilibrium under the action of three forces, then _____________________?
A. these forces are equal
B. the lines of action of these forces meet in a point
C. the lines of action of these forces are parallel
D. B. and C. above
E. none of the above - A force acting on a body may_________________?
A. introduce internal stresses
B. balance the other forces acting on it
C. retard its motion
D. change its motion
E. all of the above - A single force and a couple acting in the same plane upon a rigid body_____________________?
A. balance each other
B. cannot balance each other
C. produce moment of a couple
D. are equivalent
E. none of the above - If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?
A. P/2 cos 9/2
B. IP sin 9/2
C. 2P tan 9/2
D. IP cos 9/2
E. Psin 9/2 - Forces are called concurrent when their lines of action meet in________________?
A. one point
B. two points
C. plane
D. perpendicular planes
E. different planes - The algebraic sum of moments of the forces forming couple about any point in their plane is_________________?
A. equal to the moment of the couple
B. constant
C. both of above are correct
D. both of above are wrong
E. none of the above
